Warp stop-motion for looms.



M. L'. STONE. WARP STOP MOTION FOR LOOMSF K PPLIOATIOI FILED A PB.,29, 191 0.

PaFentd June 27, 1911 tion? the UNITED STATES PATENT, orn ong MELVIN I1. STONE, OF LAWRENCE, MASSACHUSETTS, ASSIGNOlBr TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTi'A CORPORATION OF MAINE.-

wnnr s'ror-mo'rron ron Looms.

Specification of Letters Patent.

Application filed April 29, 1910. Serial No. 558,332.

To all whom it may concern:

Be it known that I, MELVIN citizen of the United States, Lawrence, county of Essex,

L. SToNn,a and resident of State of Massa- 5 chusetts, have invented an Improvement in W'arp Stop-Motions for Looms, of which the following description, in connection, with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

The automatic stoppage of a loom through the operation of the warp stop-motion is frequently due to nundue slackness of one or moreof the warp-threads, and when such is the case it is often would be gradually could be run a short time, would be afforded ample time to the weavers-time and reduce the production of the loom unnecessarily, but as a general thing it is not possible to resume the operation of the loom until after the fault has been located and corrected, as otherwise the stop-motion would act at once to stop the loom each time it was started.

A very efficient structure designed to render thewarp stop-motion ineffective to cause loom-stoppage, and governed by and at the will of the weaver, forms the subject-matter of United States Patent No. 863,131 granted August 13, 1907 to Andrews, and the invention is broadly covered byclaims therein.

My present invention has for its object the production of very simple means whereby results can be secured similar to those disclosed in said patent but by a construction and arrangement difl'e'ring materially there-v from, my invention comprising a separable connection between the knock-off member and the shipper, so arranged that by an abnormal positioning of a part of such connection operative movement of the knock-off member will have no effect upon the shipper. Consequently, if lloom stoppage has been effected by or throughthe warp stopsmotion (the connection ;between the shipper and knocii off member being in normal con iloom can be started and run without hindrance from the warp stop-motion just as soon as the said connection is put into abnormal condition by the weaver.

- Any-suitable or convenient form of warp 6i stun-motion can be employed, and I have found that the slackness taken up if the loom or the weaver. find the; faulty thread and when necessary correct the fault. These slack-thread stoppages waste.

herein illustrated a well-known form in connection with my invention.

Figure 1- is a partial transverse section and left-hand side elevation of a suflicient part of a loom provided with a warp stopmot on, with one my invention applied thereto, the parts .be-

ing shown in the position assumed when the Patented June 27, 1911. I

racticalembodiment of loom is running under normal conditions;

Fig. 2 is a rear elevation of the knock ofi' member for the shipper, in normal or operative condition, the dotted lines indicating the position of a part of the separable connection between the shipper and the knockoff member when the loom is to be run without interference by the stop-motion; Fig. 3 1s a top plan view thereof, showing the shipper in cross-sectionon the line 33, Fig.

1; Fig. 4 is 'a side elevation of the latch which serves movable part of the separable connection in its operative position.

to maintain the relatively In Fig. 1 the lay 1, cam shaft 2, shipper I 3 and its notched holding plate 4, and the pivot 5 for the shipper, are all of well known construction, the shipper when released from its holding notch acting power from the loom through any suitable to throw off the instrumentality forming no part of my invention and not shown herein.

The warp stop-motion herein shown isthe so -called cotton-harness prises drop-devices or detectors (1 each suspended from a warp-thread which passes through a longitudinal slot d" in the detec tor, the detectorsbeing shown arranged in two banks and receiving through their slot-s transverse, fixed supports a". The slots are long enough to permit longitudinal descent of a detector into operative position when re leased by failure or undue slackness of its warp-thread. A double feeler. f carried by a rock-shaft f" is normally vibrated back and forth below the lower ends t e detectors, which latter are inclosed between parallel stop-plates a and the rock-shaft is oscil lated by links h h connected therewith and with arms h", h, respectively, a follower k cooperating with the cam C on the shaft, the latter being provided with tappets t, t, all as in United States patent to Stimpson. No. 673,824, dated May 7 1901. As in such patent the arms h and h are mounted on a hooked link- M movable in the direction of arrow 100 when the feeler is arrested by entype and com-' Eugement with a released detector in either ank. The lower end of the link- M is pivotally connected at 6, Fig. 1, with an arm 7 fixed' tota-qrock-shaft 8 suitably mounted in bearings on the cross-girth 9 of the loom, the

end of said rock-shaft projecting beyon d the as 12, the upper end'of the arm having an.

out-turned, lateral branch or extension 13 which is diagonal to the axis of the hub 11, 7 both when viewed in elevation Fig. 2, and

;-,- in-plan, :Fig 3. Said extension 13 is one ,20 part. of the separable connection with the jshlpper and forms the front side of a cam, Q1, slot or guideway 14, its rear side being:

formed by a second branch or extension 15 1 i 1 pivoted at 16 to a short bifurcated or slotted .2l 5 our 17 on the arm 10, the branch 15 forming '1 the relatively movable member of the sepak v Q r'a'ble connection. A latch 18, shown sepa- I 1 rately in Fig. 4, is fulcrumed at 19 on the 1 'outer end of the branch 15 and it is provided a 'withbcurved slot'20 to embrace a headed inor stud 21 on the outer end of the amen-13. When the latch is in operative position, Figs. land 3, and full lines Fig. 2, it, together the outer ends of the two or branches 13, 15, so that they I ar insubstantial parallelism, the cam slot I l-thus formed receiving the lower end of the'shipper 3, as shown, and the separable connectlon'between the shipper and knocki ofi member is operative. I It is very common practice to provide a knock-'qfiarin with a closed cam-slot to receive and cooperate with the shipper and sucha structure is SlllOl/Vll lll both of the patouts hereinbefore referred'to, the cam-slot 14 herein being the equivalent of the closed slot in such patented structures. The closed slot device, however,fconstitutes a pennanent connection between the'warp stop-motion and the shipper, and if the loom is ,stopped Q; located,a-nd corrected.

and the stop-motion the latch. 18 is swung I up out of engagement with the stud 21 and immediately the branch or extension 15 swings downward on the pivot 16 into inoperative position, shown by dotted lines Fig.

byorthrough such stop-motion it, cancnot be operated again until the fault is 2. Now, the shipper can be thrown into running position, so that its lower end willbe located near the "outer end of the front part or branch 13 of the separable connection, but the rear part or branch 15 will hang down, see dotted lines, Fig. 2, leaving the slot or guideway 14 open at the back. Therefore, if the stop-motion again performs its function and causes the link M to move in the direct-ion of arrow 100, Fig. 1, the arm 10 will be swung forward but the separable connection 13, 15 then being open there is nothing to push forward the lower end of the shipper and release its' upper end from the holding notch in plate 4. Consequently'the latter remains in running position as the arm 10 and branches 13, 15 of the separable connection swing forward, and the, loom continues to run. .When the separable connection is in its closed or operative condition manifestly the operation of the warpstop-motion will act through the knock-off I 'member. and said connection to release the shipper. and stop the 100m, but ifthe connectionis open, or inoperative, the shipper can be moved to starting position and the loom will continue to run irrespective of any functional operation of the warp-stop-motion. The separable connection is restored to operative condition by swinging its movable part or branch 15 up into posltion back of the shipper and opposite the branch or part 13 and locking the parts together by the latch 18.

embrace-the shipper andform a cam slot or. guideway therefor to operatively connect 1t and said arm, and a latch normally maintaining said branches substantially parallel and in operative relation at opposite sides of the shipper combined with mechanism to actuate the knock-01f arm upon the occurrence of a warp fault, manual movement of'the latch torelease the branches opening the guideway and rendering the branches inoperative to effect shipper release upon actu ation of the knock-off arm.

In a loom, a shipper," a knock-off member, mechanism to actuate it .whenever a warp fault occurs, a normally closed slotlike connection between said member and the shipper and embracing the latter to release the shipper upon actuation of the knock-off member, and said slot-like connection havwarp .fault occurs, a cam-like guideway for the shipper, mounted on the knock-ofi' member and comprising a relatively fixed side part and a pivoted side part, to embrace the shipper between them and form a controlling guideway therefor, and. adevice to refication requiring correction as Patent ()flice.

Signed and sealed this 1st day [smith] Corrections in Letters Patent No. 996,297.

It is hereby-certified that' in Letters upon the application of Melvin L. Stone, ofLawrenc-e,

follows: Page 3, line 2,

should be inserted; and that the said Letters of August, A..D., 19111.

tain said'parts in operative relation, manual movement of said device mto inoperative position releasing the pivoted side part of the guideway and opening the guideway to free the shipper from control by the said guideway when the knock-off member is actuated.- V In testimony whereof, I have signed-my name to this specification, in the presence of two subscribing'witnesses.

- MELVIN Witnesses: "NORMAN K. F LLER,

F. M. HOWARD.

L. STONE.

Patent No. 996,297, grantedJune '27, 1911,

Massachusetts, for an improvement in Warp Stop-Motions for Looms, errors appear in the printed specithe word and should I i a: .51 I be stricken out, and same page, line 3, betore the Word manuall the 01d and Patent should be read with these corrections therein that the same may conform to the record ot the ease in the B; MOORE,

Commissioner 0 f Pate'n ts.

the shipper upon actuation of the knock-off member, and said slot-like connection havwarp .fault occurs, a cam-like guideway for the shipper, mounted on the knock-ofi' member and comprising a relatively fixed side part and a pivoted side part, to embrace the shipper between them and form a controlling guideway therefor, and. adevice to refication requiring correction as Patent ()flice.

Signed and sealed this 1st day [smith] Corrections in Letters Patent No. 996,297.

It is hereby-certified that' in Letters upon the application of Melvin L. Stone, ofLawrenc-e,

follows: Page 3, line 2,

should be inserted; and that the said Letters of August, A..D., 19111.

tain said'parts in operative relation, manual movement of said device mto inoperative position releasing the pivoted side part of the guideway and opening the guideway to free the shipper from control by the said guideway when the knock-off member is actuated.- V In testimony whereof, I have signed-my name to this specification, in the presence of two subscribing'witnesses.

- MELVIN Witnesses: "NORMAN K. F LLER,

F. M. HOWARD.

L. STONE.

Patent No. 996,297, grantedJune '27, 1911,

Massachusetts, for an improvement in Warp Stop-Motions for Looms, errors appear in the printed specithe word and should I i a: .51 I be stricken out, and same page, line 3, betore the Word manuall the 01d and Patent should be read with these corrections therein that the same may conform to the record ot the ease in the B; MOORE,

Commissioner 0 f Pate'n ts.

It is herehycertified that in Letters Patent No. 996.297, granted June 27, 1911,

upon the application of Melvin L. Stone. of Lawrence, Massachusetts, for an improver nent in Warp Stop-Motions for humus," CllOla appear in the printed specification requiring correction as follows: Page 3 line 2, the word and should be stricken out and same page, line 3, before the word luanually the word and should be inserted; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the casein the Patent Oflice.

Signed and sealed this 1st day of August, A. D., 1911.

we 1 B. MOORE,

Comm issioner of Pate ts. 

